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Asteroid 7 Iris

Available Resources

Asteroid 7 Iris Sky Charts and Coordinates

This is a simplified sky chart, showing where Asteroid 7 Iris is now with respect to the brightest stars and constellations.

More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.

Asteroid 7 Iris in Corvus on March, 25 2019
High Precision Live Sky Chart
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]
12h 53m 20s
-14° 08’ 47”

Asteroid 7 Iris Rise and Set Times

Today's Asteroid 7 Iris rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the Europe/London timezone.

Azimuth: 104.1°
Max altitude: 24.3°
Azimuth: 255.8°

Asteroid 7 Iris Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid 7 Iris with respect of the Sun and the orbits of the major planets. The position of Asteroid 7 Iris and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!

Asteroid 7 Iris Ephemeris

The following table lists the ephemerides of Asteroid 7 Iris computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid 7 Iris in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2019 Mar 18 12h 59m 52s -14° 45’ 33” 9.67 Virgo
2019 Mar 19 12h 59m 00s -14° 41’ 08” 9.65 Virgo
2019 Mar 20 12h 58m 09s -14° 36’ 33” 9.63 Virgo
2019 Mar 21 12h 57m 19s -14° 31’ 49” 9.61 Virgo
2019 Mar 22 12h 56m 26s -14° 26’ 54” 9.59 Corvus
2019 Mar 23 12h 55m 32s -14° 21’ 51” 9.57 Corvus
2019 Mar 24 12h 54m 39s -14° 16’ 38” 9.55 Corvus
2019 Mar 25 12h 53m 45s -14° 11’ 17” 9.53 Corvus
2019 Mar 26 12h 52m 50s -14° 05’ 48” 9.51 Corvus
2019 Mar 27 12h 51m 56s -14° 00’ 10” 9.49 Corvus
2019 Mar 28 12h 50m 59s -13° 54’ 24” 9.47 Corvus
2019 Mar 29 12h 50m 04s -13° 48’ 30” 9.45 Corvus
2019 Mar 30 12h 49m 09s -13° 42’ 29” 9.43 Corvus
2019 Mar 31 12h 48m 12s -13° 36’ 23” 9.41 Corvus

Distance of Asteroid 7 Iris from Earth

The following chart shows the distance of Asteroid 7 Iris from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval.

The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 7 Iris is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Asteroid 7 Iris from Earth between January 2013 and December 2100

Light Curve of Asteroid 7 Iris

The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 7 Iris, according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.

Predicted magnitude of Asteroid 7 Iris between January 2013 and December 2100

Asteroid 7 Iris Physical Data

The following shows the known values of the most important physical parameters of Asteroid 7 Iris. Source: JPL Small-Body Database

Physical Parameter Value Relative to Earth
Diameter 199.83 km 0.0157
Sideral Rotation 7.1390 hours 0.2983
Absolute Magnitude 5.51
Geometric Albedo 0.2766

Asteroid 7 Iris Orbital Elements

The following table lists the orbital elements of Asteroid 7 Iris at epoch 26 April 2019 00:00 UTC (JD: 2458600.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.23120579
Orbit inclination i 5.52365144°
Perihelion distance q 1.83383083 AU
274,337,188 km
Aphelion distance Q 2.93683680 AU
439,344,533 km
Semi-major axis a 2.38533381 AU
356,840,860 km
Orbital period period 3.6800 years
1,345.6192 days
Date of perihelion transit Tp 2017-Nov-18 03:14:27
2,458,075.6350 JD
Next perihelion transit 2021-Jul-25 18:06
2,459,421.2542 JD
Argument of perihelion peri 145.26510345947°
Longitude of the ascending node node 259.56323263803°
Mean anomaly M 140.41965536039°
Mean motion n 0.26753483°/day
Closest approach to Earth* 2076-Nov-04
Distance of closest approach* 0.84836878 AU
126,914,163 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2100-Dec-31, with a sampling interval of 1 day.